Abstract: A control circuit includes: an output terminal configured to be coupled to a control terminal of a transistor that has a current path coupled to an inductor; a transconductance amplifier configured to produce a sense current based on a current flowing through the current path of the transistor; and a first capacitor, where the control circuit is configured to: turn on the transistor based on a clock signal, integrate the sense current with an integrating capacitor to generate a first voltage, generate a second voltage across the first capacitor based on a first current, generate a second current based on the second voltage, generate a third voltage based on the second current, turn off the transistor when the first voltage becomes higher than the third voltage; discharge the integrating capacitor when the transistor turns off; and regulate an average output current flowing through the inductor based on the first current.

Abstract: A system includes a receiver coil configured to be magnetically coupled to a transmitter coil, a rectifier connected to the receiver coil, a first stage and a second stage connected in cascade between the rectifier and a load and a bias voltage source configured to be connected with a first voltage node through a first switch and a second voltage node through a second switch, wherein one of the first voltage node and the second voltage node supplies power to the bias voltage source.

Abstract: A boost converting apparatus includes a boost converter and a passive lossless snubber, wherein the passive lossless snubber includes an input-end unidirectional conduction component, a resonant inductor, a resonant capacitor, and an output-end unidirectional conduction component. The present disclosure can solve the problems that the energy conversion efficiency of the hard-switching boost converter is poor and the structure of the soft-switching boost converter is complicated.

Abstract: A power device includes a power factor corrector, an auxiliary capacitor, a switching device, an auxiliary boost circuit, a controller and a voltage conversion device. The switching device has a first end electrically connected to the output end of the power factor corrector, and a second end electrically connected to one end of the auxiliary capacitor. An output end of the auxiliary boost circuit is electrically connected to the output end of the power factor corrector, an input end of the auxiliary boost circuit is electrically connected to a middle end of the switching device, and a ground end of the auxiliary boost circuit is electrically connected to another end of the auxiliary capacitor. The controller is electrically connected to the switching device and the auxiliary boost circuit. The input end of the voltage conversion device is electrically connected to the output end of the power factor corrector.

Abstract: A modular direct current power source is provided. One welding power supply system includes a plurality of hysteretic buck converters coupled in parallel. The hysteretic buck converters are configured to receive a common input and to provide combined output power to a common load based upon the common input.

Abstract: A power conversion device includes first and second current detectors. A coil is connected a first power terminal through the first and second current detectors. A first switch has a source terminal connected to the coil and a second semiconductor switch has a drain terminal connected to the coil. A first diode is connected between a drain terminal of the first semiconductor switch and a second power supply terminal. A second diode is connected between a source terminal of the second semiconductor switch and the second power terminal. A capacitor is connected in parallel with the first and second diodes. A control circuit is configured to turn the first and second semiconductor switches on or off based on current detections of the first and second current detectors.

Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a rectifier circuit, a capacitor, a series switching element, a resistive element, a drive circuit, a peak voltage value acquirer, and a controller. The capacitor smooths power rectified by the rectifier circuit. The series switching element is coupled in series with the capacitor. The resistive element is coupled in parallel with the series switching element. The controller brings the series switching element into conduction in a case where AC power is inputted to the rectifier circuit and where a specified conducting condition based on a peak voltage value acquired by the peak voltage value acquirer is satisfied.

Abstract: An active bridge rectifying control apparatus includes a bridge rectifying unit and a rectifying control module. The rectifying control module includes a phase control unit, a low-side drive unit, and a self-drive unit. The phase control unit provides a live line signal and a ground line signal according to a positive half cycle and a negative half cycle of an AC power source. The low-side drive unit provides a low-side control signal according to the live line signal and the ground line signal. The self-drive unit establishes a drive voltage according to the positive half cycle and the negative half cycle of the AC power source, and provides a high-side control signal according to the low-side control signal. The bridge rectifying unit rectifies the AC power source into a DC power source according to the low-side control signal, the high-side control signal, and the drive voltage.

Abstract: A filter capacitor discharge circuit includes a high-voltage terminal, a signal preparation circuit, a low-pass filter, a voltage level detector, a timer unit, and a switch unit. The signal preparation circuit receives a detection signal corresponding to an AC voltage from the high-voltage terminal, and generates a voltage signal according to the detection signal. The low-pass filter provides a filtered signal according to the voltage signal. The voltage level detector checks whether a voltage difference between the voltage signal and the filtered signal is less than a predetermined value. When the voltage difference is less than the predetermined value, the timer unit performs time calculation to accumulate a timing result. When the timing result exceeds a predetermined time, the switch unit is turned on so that the firster capacitor is discharged through the switch unit.

Abstract: A control circuit includes: a flip-flop having an output configured to be coupled to a control terminal of a transistor and for producing a first signal; a comparator having an output coupled to an input of the flip-flop, and first and second inputs for receiving first and second voltages, respectively; a transconductance amplifier having an input for receiving a sense voltage indicative of a current flowing through the transistor, and an output coupled to the first input of the comparator; a zero crossing detection (ZCD) circuit having an input configured to be coupled to a first current path terminal of the transistor and to an inductor, where the ZCD circuit is configured to detect a demagnetization time of the inductor and produce a third signal based on the detected demagnetization time; and a reference generator configured to generate the second voltage based on the first and third signals.

Abstract: Disclosed is a voltage converter capable of adaptively operating in one of a synchronous mode and an asynchronous mode according to an input voltage of an input terminal. The voltage converter includes: a voltage detector generating a detection result according to the input voltage; a switch control circuit generating a first switch control signal and a second switch control signal according to the detection result and an output voltage of an output terminal; a first switch intermittently turned on according to the first switch control signal in the synchronous and asynchronous modes; a second switch intermittently turned on/off according to the second switch control signal in the synchronous/asynchronous mode; and an energy storage circuit electrically connected to the input and output terminals to store and release energy according to the on-off states of the first and second switches.

Abstract: A power supply capable of protecting a rectifier circuit using a switching element from an overvoltage or an overcurrent is provided. The power supply includes a power input terminal; an output capacitor; a synchronous rectifier configured to rectify an AC voltage input through the power input terminal; a converter configured to convert the rectified AC voltage into a DC voltage following a preset voltage and supply the DC voltage to the output capacitor; and a protection circuit provided between the power input terminal and the output capacitor, and configured to supply an AC voltage higher than the voltage charged in the output capacitor to the output capacitor by bypassing the synchronous rectifier.

Abstract: A direct power converter includes a converter that rectifies a single-phase AC voltage, converts AC power into DC power, and outputs first instantaneous power; a power buffer circuit that receives and supplies power between the converter and a DC link and that performs buffering second instantaneous power; and an inverter that converts a DC voltage at the DC link into a second AC voltage and outputs the second AC voltage. A period for which a current that flows from the converter to the power buffer circuit continuously flows in a period shorter than a half-period of the AC voltage is longer when third power input to the inverter, fourth power output by the inverter, or an average value of the first instantaneous power decreases to a value which is less than a first threshold, from a value which is greater than or equal to a second threshold that is greater than or equal to the first threshold.

Abstract: An induction heating device includes a first resonance circuit comprising a first working coil and a first resonance capacitor, a first inverter electrically connected to the first resonance circuit and configured to perform a first switching operation to thereby apply a first resonance current to the first working coil, a first group of snubber capacitors that are configured to be electrically connected to the first inverter, the first group of snubber capacitors comprising a first snubber capacitor and a second snubber capacitor, and a first relay configured to selectively connect the first group of snubber capacitors to the first inverter.

Abstract: A converter for converting a three-phase AC input into a DC output may include three phase input terminals and two output terminals, a phase selector for connecting the three-phase AC input to an upper intermediate node, a lower intermediate node, and a middle intermediate node. The phase selector includes semiconductor switches for selectively connecting the middle intermediate node to the three phase input terminals, and a controller. The electrical converter includes a boost circuit and a buck-boost circuit. The boost circuit includes an upper boost circuit, a lower boost circuit, and a common node. The buck-boost circuit has an output connected to the two output terminals in parallel with an output of the boost circuit, and includes at least two semiconductor switches that are actively switchable and connected in series across the output terminals. The middle intermediate node is connected to a common node of the two second semiconductor switches.

Abstract: A boost converter with high power factor includes a bridge rectifier, a divider and filter circuit, a capacitive adjustment circuit, an induction circuit, a multiplier, a power switch element, a PWM (Pulse Width Modulation) IC (Integrated Circuit), an output stage circuit, and a feedback circuit. The bridge rectifier generates a rectified voltage according to a first input voltage and a second input voltage. The divider and filter circuit generates a divided voltage according to the rectified voltage. The output stage circuit generates an output voltage. The feedback circuit generates a feedback voltage according to the output voltage. The multiplier generates a product voltage difference according to the divided voltage and the feedback voltage. The capacitive adjustment circuit is enabled or disabled according to the feedback voltage. The induction circuit selectively provides a compensation current according to the product voltage difference.

Abstract: A switched mode power supply (SMPS) includes a filter, a power factor correction (PFC) circuit, and a control circuit configured to determine various electrical parameters of the SMPS. In some embodiments, the control circuit is configured to determine a power line frequency and an AC input voltage based on an AC line voltage and an AC neural voltage. In other embodiments, the control circuit is configured to determine an AC input current based on a reactive current flowing through the filter and a PFC AC current. In further embodiments, the control circuit is configured to report a value of an electrical parameter if value is determined to be accurate. Other example switch mode power supplies, control circuits and methods are also disclosed.

Abstract: A multi-phase power factor converter is disclosed. In embodiments, each phase of the power factor converter includes a voltage measurement circuit, a boost coil, a current measurement circuit, and a comparator. The voltage measurement circuit is configured to detect an input voltage. The current measurement circuit configured to detect a current in the boost coil. The comparator configured to compare the input voltage to the current in the boost coil, and a plurality of transistors (e.g., forming a MOSFET bridge) are driven by an output of the comparator.

Abstract: A power supply device with low loss includes an input switch circuit, a transformer, a first capacitor, an output stage circuit, and a detection and control circuit. The input switch circuit generates a switching voltage according to an input voltage. The output stage circuit generates an output voltage. The output stage circuit includes a first rectifying switch element and a second rectifying switch element. The detection and control circuit detects a first output current flowing through the first rectifying switch element so as to generate a first control voltage, and it detects a second output current flowing through the second rectifying switch element so as to generate a second control voltage. The first rectifying switch element is selectively closed or opened according to the first control voltage. The second rectifying switch element is selectively closed or opened according to the second control voltage.

Abstract: According to one embodiment, the controller configured to, when an operation of the boosting circuit is in the boosting mode, and if an instantaneous value Ia of a current flowing through the reactor lowers to a value smaller than or equal to a set value Ias, switch the operation of the boosting circuit from the boosting mode to the non-boosting mode.

Abstract: Controlling gate-source voltage with a gate driver in a secondary-side integrated circuit (IC) controller for a secondary-controlled AC-DC converter is described. In an example embodiment, the gate driver is configured to programmably control the gate-source voltage and the slew rate of a secondary-side provider field effect transistor (FET) in the converter.

Abstract: Resonant power converters. Example embodiments are methods of operating a rectification controller including sensing a drain-source voltage of a synchronous rectification (SR) field effect transistor (FET); setting an adaptive delay time corresponding to a time interval between a first state transition and a second state transition, with each of the first and second state transitions corresponding to the drain-source voltage transitioning between being greater than the adaptive delay voltage and being less than the adaptive delay voltage; and driving the SR FET to a conductive state after the drain-source voltage having been less than the on-threshold voltage for longer than the adaptive delay time.

Abstract: A light-emitting diode (LED) luminaire emergency driver comprises a rechargeable battery, a power supply unit, an LED driving circuit, a first control circuit, and a second control circuit. The LED driving circuit and the power supply unit each comprises a scalable power control scheme respectively configured to drive external LED arrays with different power levels when the alternate-current (AC) mains are unavailable and to power the first control circuit and to charge the rechargeable battery with different capacity when the AC mains are available. The second control circuit comprises two switches configured to control discharging and charging of the rechargeable battery. The second control circuit further comprises a relay switch circuit configured to control either a first LED driving current from the LED driving circuit or a second LED driving current from an external power supply unit to drive the external LED arrays without crosstalk.

Abstract: Disclosed is a display device including a power factor corrector including a converter correcting a power factor of an input power and a controller controlling the converter, a power transformer converting power, of which a power factor is corrected by the power factor corrector, and a display panel receiving power through the power transformer to display an image. The controller controls the converter to increase a first voltage when the first voltage output through the converter is less than a specified voltage. Other various embodiments as understood from the specification are also possible.

Abstract: Disclosed is a power factor correction circuit including a plurality of legs connected in parallel and each leg including two switching devices connected in series, a plurality of inductors, each inductor having one terminal connected to an interconnection node of the two switching devices in a corresponding one of the plurality of legs, and a controller configured to control on/off states of the switching devices of the plurality of legs in a pulse width modulation manner such that each of the inductors of the plurality of inductors is built up twice or more in one switching period of the switching devices when an alternating current (AC) voltage is input to the other terminal of each inductor of the plurality of inductors.

Abstract: The X-ray generator includes a booster for boosting a first DC voltage supplied from a voltage source to a second DC voltage higher than the first DC voltage, at least one capacitor for receiving the second DC voltage and generating a charging voltage on the basis of the second DC voltage, a converter for converting the charging voltage into a driving voltage, an X-ray source for receiving the driving voltage and emitting X-rays according to the driving voltage, and a controller for controlling the booster, the converter, and the X-ray source. The controller calculates a cooling time required for cooling the X-ray source to a predetermined temperature or lower, determines the magnitude of the second DC voltage according to the cooling time, and applies the second DC voltage to the capacitor for the cooling time.

Abstract: An example system includes a rectifying component to convert an alternating current (AC) signal into a direct current (DC) signal. The system also includes a filtering component. The filtering component determines that a plurality of AC cycle drops have occurred and will deactivate the AC signal in response to that determination. Furthermore, the system includes an isolating component. The isolating component consumes greater than a threshold level of power in one state and less than a threshold level of power in another state. The isolating component is operating in the state that consumes greater than a threshold level of power when the signal that indicates the AC voltage is at a level in which it may allow the device to operate safely and properly is deactivated.

Abstract: A method and device for transmitting (20) to an electrical element (4) the power of a radio frequency type signal received by a radio frequency receiver (1), e.g., a radio frequency identification (RFID) chip, the receiver (1) having a receiving antenna (2) and a voltage rectifier (3) of the signal received by the antenna (2), the transmission device (20) including a voltage converter (30) connected to the rectifier (3) of the chip and to the electrical element (4). The device includes a control system (40) configured to momentarily derive the signal from the rectifier (3) in order to define an optimal input voltage of the converter (30) for which the input impedance of the converter corresponds to the output impedance of the rectifier (2), and to redirect the DC signal to the voltage converter (30) by providing the converter with an input voltage setpoint corresponding to the optimal voltage.

Abstract: Disclosed are a power stabilization circuit and a display device to which the power stabilization circuit is applied. The power stabilization circuit includes a thermistor provided on a first path through which an input power is supplied, to limit an inrush current of the power, a relay that provides a second path through which the power is supplied without passing through the thermistor, to allow the power to be transferred through the second path instead of the first path when a current is supplied, and a switching circuit that is switched to supply the current generated from the input power to the relay when an activation signal for activating at least one of a display and a backlight of the display is received.

Abstract: In a control apparatus for a power converter, a current obtainer obtains a current flowing through an inductor as an inductor current, and an alternating-current voltage obtainer obtains an alternating-current voltage. A drive signal outputting unit generates, based on the alternating-current voltage obtained by the voltage obtainer, a sinusoidal command. The drive signal outputting unit performs peak-current mode control to output a drive signal that controls switching of the drive switch to thereby cause the inductor current to follow the sinusoidal command. A delay unit delays, for one switching cycle of the drive switch, an off-switching timing of the drive switch in accordance with the alternating-current voltage. The drive signal defines the off-switching timing of the switch.

Abstract: A method for operating a power converter is described. The power converter includes three input nodes each configured to receive a respective one of three input voltages, two DC link nodes configured to provide a DC link voltage, and a midpoint coupled to each DC link node. Three inductors are each connected to a respective one of the three input nodes. A rectifier bridge including three bridge legs are each coupled to a respective one of the three inputs through a respective one of the three inductors and connected to the respective one of the three inductors at a respective switch node. Each bridge leg is connected to the two DC link nodes and the midpoint, and includes at least one electronic switch. The power converter is operated in a reduced switching mode by deactivating at least one of the three bridge legs for a predefined time period.

Abstract: A power converter including: a dual output resonant converter including a first output, a second output, a common mode control input, and a differential mode control input, wherein a voltage/current at the first output and a voltage/current at the second output are controlled in response to a common mode control signal received at the common mode control input and a differential mode control signal received at the differential mode control input; a dual output controller including a first error signal input, a second error signal input, a common mode control output, and a differential mode control output, wherein the dual output controller is configured to generate the common mode control signal and the differential mode control signal in response to a first error signal received at the first error signal input and a second error signal received at the second error signal input, wherein the first error signal is a function of the voltage/current at the first output and the second error signal is a function of

Abstract: An active bridge rectifier circuit includes a rectifier unit and a control unit. The rectifier unit includes a first upper bridge switch, a second upper bridge switch, a first lower bridge switch, and a second lower bridge switch. The control unit includes a first signal comparator and a second signal comparator. The first signal comparator compares a live wire signal provided from a live wire end with a neutral wire signal provided from a neutral wire end to generate a first comparison signal. The second signal comparator compares the live wire signal with the neutral wire signal to generate a second comparison signal. The first comparison signal controls the first upper bridge switch and the first lower bridge switch. The second comparison signal controls the second upper bridge switch and the second lower bridge switch.

Abstract: A power supply circuit supplying power to components of a fixed or mobile electrical or electronic device includes a main battery, an auxiliary battery, and main and auxiliary switch units. The main battery and the main switch unit form a main power supply circuit, and the auxiliary battery and the auxiliary switch unit form an auxiliary power supply circuit. The main switch unit includes a lighting unit controlling the switching on or off of the auxiliary switch unit. When the lighting unit is switched on, the auxiliary switch unit is switched off and the auxiliary power supply circuit is disabled. When the lighting unit is switched off, the auxiliary switch unit is switched on and the auxiliary power supply circuit is enabled. An electronic device including such a power supply circuit is also provided.

Abstract: The present disclosure discloses television power driving device and television, standby control module controls power supply module to turn on resonance control module and PFC circuit successively when receiving power-on signal, PFC circuit outputs PFC voltage to first and second LLC resonance modules, first LLC resonance module converts PFC voltage into first voltage and second voltage according to first control signal, outputs respectively to mainboard and secondary LLC control module for power, after being rectified and filtered by rectifying filter module.

Abstract: A selected-parameter adaptively switched power conversion system, for example, includes a counter for determining a period of an output oscillation a power supply switch, where the output oscillation starts when an output current generated by stored power of the power supply coil decays substantially to zero. An event generator for generating a switching delay event in response to the determined output oscillation period and generates a switching delay event in response to a determination of a phase of the output oscillation.

Abstract: A low-power direct current-direct current (DC-DC) converter includes a capacitor, an inductor electrically connected to the capacitor, a first switch configured to be turned on for a first switching interval and supply energy from an input power source to the inductor for the first switching interval, a second switch configured to be turned on for a second switching interval and electrically connect the inductor and a ground terminal for the second switching interval, and a switching control circuit configured to generate first and second switching signals. The switching control circuit is further configured to generate a first sample signal by sampling the voltage level of a first node, and to determine, responding to the first sample signal in time domain, an pulse width adjustment adapted to adjust at least one of the length of a second switching interval and the length of a common blocking interval.

Abstract: A method of AC-to-DC conversion is disclosed, comprising steps of: rectifying an AC voltage to a pulsating DC voltage; coupling the pulsating DC voltage to a capacitor via a switch; coupling an output voltage of the capacitor to a load; monitoring a signal of the load; determining a voltage deviation of the signal of the load from a predetermined reference; in synchronization and in every cycle of the pulsating DC voltage, turning on the switch at a first time instant when the switch is not forward biased and turning off the switch in response to the voltage deviation at a second time instant; whereby the signal of the load is controlled.

Abstract: The present invention provides a power control circuit and a power device using the power control circuit, wherein quasi resonance is performed by the power control circuit using a coil, current flowing in the coil is monitored by a simple configuration, and a zero cross point or a bottom in resonance is detected. The present invention provides a power control circuit and a power device using the power control circuit. The power control circuit includes a detection circuit connected to a drain of MOSFET, the MOSFET serially connected between an inductor connected to an alternating-current wire and a current sensing resistor connected to ground potential; and a quasi resonance control circuit connected to the detection circuit and the MOSFET for performing quasi resonance control to inductor-current at a zero cross point or a bottom point in a time sequence of discharging while conducting the inductor-current of the inductor.

Abstract: A module of suppressing inrush current, a method of controlling the module of suppressing inrush current and an on-board bidirectional charger using the same are provided. The on-board bidirectional charger includes a PFC-inverter module and the module of suppressing inrush current, and the module of suppressing inrush current includes a controlled switch and a suppressor of suppressing inrush current connected in parallel with the controlled switch.

Abstract: A power converter controller includes a control loop clock generator to generate a switching frequency signal responsive to a burst load threshold, a power signal, and a load signal. A switching frequency of the switching frequency signal is above a mechanical audio resonance range of an energy transfer element and above an audible noise frequency. A burst control circuit generates a burst on signal and a burst off signal in response to a feedback signal and a burst enable signal to operate the controller in a plurality of burst modes. A burst frequency of the burst on signal or the burst off signal is less than the mechanical audio resonance range. A request transmitter circuit generates a request signal responsive to the switching frequency signal, the burst on signal, and the burst off signal to control switching of a switching circuit.

Abstract: Various embodiments relate to a circuit for power factor correction (“PFC”), the circuit including: a mains filter and rectifier configured to generate an input voltage for power factor correction and transmit the input voltage to a PFC controller and a load block; a voltage regulator configured to regulate the input voltage and output a control signal to an adder; a mains voltage sensor configured to sense a mains voltage and output a sensed mains voltage; a bandpass filter configured to filter out frequencies in a range of resonance frequencies of the sensed mains voltage and output an additional signal; and an adder configured to add the additional signal to the control signal and output a desired input current to the PFC controller.

Abstract: A boost converter includes a voltage output terminal, a power transistor, and short circuit protection circuitry. The voltage output terminal is configured to provide a boosted output voltage generated by the boost converter. The power transistor is configured to draw current through an inductor. The short circuit protection circuitry is configured to control current flow through the inductor responsive to detection of a short circuit at the voltage output terminal. The short circuit protection circuitry includes an output switch coupled to an input terminal of the power transistor and connected to the voltage output terminal. The output switch is configured to switch current flow from the inductor to the voltage output terminal. The output switch is a negative (N) channel metal oxide semiconductor field effect transistor (MOSFET).

Abstract: A power supply circuit having a rectifier circuit that rectifies an AC voltage, an inductor, a transistor that controls an inductor current flowing through the inductor, a drive signal generating circuit that generates a drive signal based on the inductor current and an output voltage generated from the AC voltage, and a drive signal output circuit outputting the drive signal. The drive signal generating circuit includes a command-value output unit that outputs a command value for increasing and decreasing the inductor current when the output voltage is lower or higher than a target level, respectively, a rectified-voltage calculation unit that calculates a value of the rectified voltage based on an inductance of the inductor and an amount of change in the inductor current in a predetermined time period, and an ON-period calculation unit that calculates an ON period in a switching period of the transistor.

Abstract: Power converters, protection systems and methods to protect a precharge circuit in which a precharge resistor voltage is indirectly monitored during a normal operating mode, and a rectifier and an inverter are selectively disabled in response to the indirectly measured precharge resistor voltage indicating a fault in a precharge circuit SCR.

Abstract: Methods and systems to transform an alternating current into constant-polarity constant or pulsed voltages, provide these to a first group of contacts of an electrical connector assembly such that none of the contacts is subjected to polarity reversal, receive the constant-polarity constant or pulsed voltages from a second group of contacts of the electrical connector assembly, and reconstruct the alternating current from these voltages.

Abstract: According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.

Abstract: An example voltage converter includes a transformer having a primary winding, a first secondary winding, and a second secondary winding; a first transistor connected between a first terminal of the first secondary winding and electrical ground, where the first transistor has a first drain; a second transistor connected between a second terminal of the second secondary winding and electrical ground, where the second transistor has a second drain; and a capacitor connectable along a current path to the transformer via at least one of the first transistor or the second transistor. A control system detects a first voltage at the first drain and a second voltage at the second drain, and generates pulse-width modulated control signals based at least on the first and second voltages to control operation of the first and second transistors to produce voltage at the primary winding based on a voltage across the capacitor.

Abstract: A coil component including 2N coils, N being an integer of two or more, wherein the 2N coils are configured to form N pairs, and wherein when coils other than a first coil and a second coil forming one of the N pairs are defined as the other coils, a magnetic coupling between the first coil and the second coil is stronger than a magnetic coupling between the first coil and each of the other coils.

Abstract: Direct-current-to-direct-current (DC-DC) power converters that include two or more multi-quadrant, multi-level, DC-DC, switching converter subcircuits, connected in parallel at respective input and output sides, so as to provide a multi-channel, multi-quadrant, multi-level configuration, are disclosed. The DC-DC power converters further include a control circuit configured to control the switching converter subcircuits so that corresponding switching semiconductors in each of the switching converter subcircuits are switched in an interleaved manner. In some embodiments, each of the switching converter subcircuits is a three-level, neutral-point-clamped, four-quadrant DC-DC converter circuit. In other embodiments, each of the switching converter subcircuits is a three-level, neutral-point-clamped, two-quadrant DC-DC converter circuit. In any of these embodiments, a filter capacitor may be connected between across a pair of output terminals at the output sides of the switching converter subcircuits.